tailodds FORECAST
Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Portland → Chicago via Atlanta: arrives on time 43%

  1. 18:59 PWM → 21:56 ATL
    DL 488 · Delta · 2h 58m · 68% on time, 4.4% cancelled
  2. 54m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 22:50 ATL → 23:53 ORD
    DL 1199 · Delta · 2h 09m · 71% on time, 2.9% cancelled

Total trip 6h 00m, scheduled departure to arrival (Chicago is 1 h behind Portland). Times are local. Both flew on 54 of the last 56 days.

Makes the connection64%The first flight arrived more than 9 minutes late on 36% of the days it flew: too late for the 45-minute minimum connection on a 54m layover.
Arrives on time43%First flight not cancelled (4.4% are) × connection made (64%) × second flight not cancelled (2.9% are) and within 15 minutes (71%).
Total trip6h 00mPWM 18:59 to ORD 23:53, layover included

Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.

Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.